Fan-guard



Ntra Sterns Aram rtree ALEXANDER lV. MESTON, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE EMERSON ELECTRIC MANUFACTURING COMPANY, OF MISSOURI.

FAN-GUARD.

SPECIFICATION forming part of Letters Patent No. 515,405, dated February 27, 1894.

Application filed August l, 1892.

yT0 a/ZZ whom it rntty concern:

mi Be it known that I, ALEXANDER W. MES- TON, a citizen of the United States, residing in the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Fan-Guards, of which the following is a full, clear, and exact descriptiomsuch as will enable others skilled in the art to which it appertains to make and use the saine.

My invention relates to a new and useful improvement in guards for revolving fans, and is especially adapted for application to and around revolving` fans which receive impetus from an electric motor.

The first feature of the invention resides in the peculiar construction of the separable supporting arms for the guard-rings and their means of connection between themselves and the rings.

A second feature residesin the construction of the spoke-guards, and the method of attachment to the guard-rings and hub-ring. And, finally, minor details of invention which consist in the construct-ion, arrangement, and combination of the several parts all as will hereinafter be described, and afterward pointed out in the claims.

Referring to the drawings forming a part of this specification, wherein like letters of reference refer to like parts wherever they occur, Figure l is a perspective view of a portion of my improved fan-guard. Fig. 2 is a detail sectional view, and Fig. 3 is a plan-view of the inner-connecting ends of the supporting arms or spokes.

In the drawings, A and B indicate two parallel guard-rings, in which are formed registering openings for the passage of the spokes.

C indicates the spokes, the main,or radial, portion of which is curved, or thrown out of a straight line, to form a wave or compound curved line, as shown. The inner ends of these spokes C are bent inwardly a short distance from the end, and the bent portion o passed through and secured in an opening in the hub ringD. The outer ends of the spokes are bent parallel to each other, as at c, and pass through the openings in the guard-ring A, after which the same are passed through, and secured in, the registering openings in the parallel guard-ring B. The ends of the sannita/141,868. ou model.)

bent portion cand c may be riveted, soldered,

or secured in any suitable manner to their respective rings B and D. To hold the rings rigidly parallel during the attachment of the spokes, and to form a support for the supporting arms l, 2, and 3,1 string on the guardrings a spacing block E formed with openings in its ends for the passage of the guard-rings, against which guard-rings impinge the binding screws to adjustably retain the spacing blocks in place and accommodate any irregularity in the curvature of the inner ends of the supporting arms, should they not iit with exact precision.

Projecting from the iuner end of the spacing block E, is a bearing e to which the outer ends @f the supporting arms l, 2,'and 3 are secured through the medium of a screwf passing through the heads l, 2a, and 3a [the first, l, only, being shown in this instance] The inner ends of the arms 1*.2-3 are attened and bent downwardly out of the plane of the body portions, as at lb, 2b, and 3b, at which point they are curved laterally, the ends of the curved portions terminating in a foot l, 2C, and 3, as shown in Fig. 3, which foot forms an abutting shoulder on its under side [see Fig. 2] for a bearing on the edge of the iiattened portions at the beginning of the curve, to which the foot is secured. By curving or bending the inner ends, so as to extend over rand be secured to the next succeeding supporting arm, I am enabled, by this assemblage, to form a continuous ring composed of sections, each section beinga continuation of an arm, which not only tends to prevent lateral torsion of the arms, but adds rigidity to the structure by so interlocking the parts. Iform registering screw-openings in the flattened portions near the beginning of the curve also, in the foot portions, and pass therethrough the securing screws g.

g indicates securing screws, which, in the instance of a three-part supporting ring and arms, are adapted to pass through the foot lc and iiattened portion. 2", the foot 2 and flattened portion 3), and the foot 3c and the attened portion lb, respectively, their threaded ends extending beyond the lower planes of the several flattened portions and secured in any suitable support [not shown].

IOO

l 3, are secured to their respective spacingV It will be noted that, when the arms l, 2, and

blocks E, and their inner curved ends intersectingly assembled, the functions of the securing screws are two-fold: first, they hold the parts rigidlyin their assembled positions, and, second, they provide a means for securing the guard to its support.-

The advantage derivedfrom forming the' guard-spokesV curved, so as to make them susceptible of longitudinal elongation, or flexibly extending the same beyond their original length, is, that in assembling the guard as a Whole, the guard-rin gs are irst spaced by the blocks E, and adjusted so that the openings for the passage of the spokes Will register. The parallel portions c are first introduced through the ring Aand then through the ring B, Where they are secured, either by upsetting the metal of the spokes, at that point, or by solder. The inner `ends c Which have been previously bent to conform to the right angular openings in the hub-ring D, are then introduced therein, and secured in a similar manner.

Should it prove, in the attachment of the bent end c in the hub-ring D, that the bent ends vary in distance from the ring A, either being too long or too short, it is obvious that this evil may be easily remedied, either by compression, or elongation, Without in the least depreciating the general appearance of the structure.

I do notWish to be understood as confining myself to the exact number of supporting arms, nor the method of the assemblage of the several parts, as it will be obvious that many minor changes may be made, Without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secure byLetters Patent, is-

1. In a fan guard the combination with guard rings and guard spokes, of spacing blocks provided with eyes in their ends through which said guard rings pass, substantially as described.

2. In a fan guard, the combination with parallel guard rings of adjustable spacing blocks interposed there between, and means for holding said spacing blocks in their adjusted positions, substantially as described.

3. In combination with a fan guard, of supporting arms therefor comprising a radiating portion and curved inner ends said ends being an arc of a circle having means at the termini of saidarc, of attachment vto the next adjacent arm, substantially as described. v

4. In a fan guard the combination with parallel guard rings and guard spokes, of a hub ring to which said spokes are secured, adjustable spacing blocks between the parallel guard rings formed With an inwardly extending lug forming a bearing, supporting arms secured to said lug having their inner ends curved to form arcs of a circle, one end of said arcs being flattened and the other end provided with a projecting foot portion adapted to overlap the flattened portion of the next preceding curved portion of the adjacent arm in the form of an arc of a circle, and means passing through the foot portion and the flattened portion of the several arcs for securing them together and holdingthe `arms in posi-A tion, substantially as described.

5. In a fan guard, the ycombination with guard rings, ot' supporting arms therefor, com y prising radiating portions, having means of` attachment to the guard rings at their outer ends, and having their inner ends curved to conform to an arc of a given circle, said curved or arc portions being flattened at one of their ends the opposite ends being formed with projecting foot portions, which are adapted to overlap, and be secured to the iattened portion of the next preceding curved port-ion, or arc of the adjacent arm, substantially as described.

In testimony Wh ereof I aftix my signature, in presence of two Witnesses, this 23d day of July, 1892.

ALEXANDER W. MESTON. Witnesses:

F. R. OORNWALL,

A. RAMEL. 

